John thought he was ____ when the manager asked him for the advice on the new product.
---Did the naughty boy break the glass by chance? ---No, ________.
Iraq has _______ too many wars since 1990s, making his people _______a lot.
Jim didn’t realize his little sister was crying _____ what he had said.
The number of the teacher invited _____ twelve, but a number of them ___ late for different reasons.
Young people spend most of their time _________, for they don’t want to stay at home all day.